Can you tell me how is it developed from the antiquity of occupational health?

Measuring your progress by weight (only)? a: the fit of your clothes b: bathroom scale c: body fat scale d: body fat caliper

The load is the pivot point of a lever.

Melanocytes and keratinocytes work together in protecting the skin from uv damage when keratinocytes a. provide the melanocyte with a protective shield against abrasion b. maintain the appropriate temperature so the product of the melanocyte will not denature c. maintain the appropriate ph in order for the melanocyte to synthesize melanin granules d. accumulate the melanin granules on their superficial portion, forming a uv-blocking pigment layer